import java.util.*;
class Student{
int sNO;
String sName;;
char sSex;
char sAge;
double sJava;
Student(int a,String b,char c,char d,double e){
sNO=a;
sName=b;
sSex=c;
sAge=d;
sJava=e;
}
double[] q=new double[5];
Student(){}
int getNo(){
return sNO;
}
String getName(){
return sName;
}
char getSex(){
return sSex;
}
double getJava(){
return sJava;
}
void print(double s){
System.out.println("平均成绩是"+s);
}
void print1(double s){
System.out.println("最高时"+s);
}
void print2(double s){
System.out.println("最低是"+s);
}
double come(double f,double g,double h,double j,double k){
q[0]=f;
q[1]=g;
q[2]=h;
q[3]=j;
q[4]=k;
return 0;
}
}
class ch8{
public static void main(String[] args){
Student s=new Student();
Student s1=new Student(14156,"lisi",'v','r',89);
Student s2=new Student(14556,"lisan",'r','t',90);
s.print((s1.sJava+s2.sJava)/2);
Student s3=new Student(14556,"lisan",'r','t',35);
Student s4=new Student(14556,"lisan",'r','t',69);
Student s5=new Student(14556,"lisan",'r','t',92);
Student s6=new Student(14556,"lisan",'r','t',87);
Student s7=new Student(14556,"lisan",'r','t',73);
s.come(s3.sJava,s4.sJava,s5.sJava,s6.sJava,s7.sJava);
Arrays.sort(s.q);
s.print2(+s.q[0]);
s.print1(+s.q[4]);
}
}
import java.util.*;
class Circle{
double radius;
Circle(){
radius=0;
}
Circle(double r){
radius=r;
}
double getArea(double r){
return Math.PI*radius*radius;
}
double getPerimeter(double r){
return 2*Math.PI*radius;
}
void disp(){
System.out.println("半径是"+radius);
System.out.println("周长是"+getPerimeter(radius));
System.out.println("面积是"+getArea(radius));
}
}
class Cylinder extends Circle{
double height;
Cylinder(double r,double h){
super(r);
this.height=h;
}
double getVol(){
return Math.PI*this.radius*this.radius*height;
}
void dispVol(){
System.out.println("体积是"+getVol());
}
}
class ch5{
public static void main(String[] args){
Scanner input=new Scanner(System.in);
Circle R= new Circle(input.nextDouble());
R.disp();
Cylinder p=new Cylinder(R.radius,input.nextDouble());
p.getVol();
p.dispVol();
}
}